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Unraveling the biogeographical history of Chrysobalanaceae from plastid genomes
- Source :
- American Journal of Botany, American Journal of Botany, Botanical Society of America, 2016, 103 (6), pp.1089-1102. ⟨10.3732/ajb.1500463⟩
- Publication Year :
- 2016
- Publisher :
- Wiley, 2016.
-
Abstract
- Premise of the study The complex geological and climatic history of the Neotropics has had major implications on the diversification of plant lineages. Chrysobalanaceae is a pantropical family of trees and shrubs with 75% of its 531 species found in the Neotropics, and a time-calibrated phylogeny of this family should shed light on the tempo of diversification in the Neotropical flora. Previously published phylogenetic hypotheses of this family were poorly supported, and its biogeography remains unclear. Methods We assembled the complete plastid genome of 51 Chrysobalanaceae species, and increased taxon sampling by Sanger-sequencing of five plastid regions for an additional 88 species. We generated a time-calibrated tree including all 139 Chrsyobalanaceae species and 23 outgroups. We then conducted an ancestral area reconstruction analysis and estimated diversification rates in the family. Key results The tree generated with the plastid genome alignment was almost fully resolved. It supports the polyphyly of Licania and Hirtella. The family has diversified starting around the Eocene-Oligocene transition. An ancestral area reconstruction confirms a Paleotropical origin for Chrysobalanaceae with several transoceanic dispersal events. The main Neotropical clade likely resulted from a single migration event from Africa around 28 mya ago, which subsequently underwent rapid diversification. Conclusions Given the diverse ecologies exhibited by extant species, we hypothesize that the rapid diversification of Chrysobalanaceae following the colonization of the Neotropics was triggered by habitat specialization during the complex geological and paleoclimatic history of the Neotropics.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Time Factors
Genetic Speciation
Biogeography
Genome, Plastid
Pantropical
Licania
[SDV.BID]Life Sciences [q-bio]/Biodiversity
Plant Science
Extinction, Biological
[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy
010603 evolutionary biology
01 natural sciences
Chrysobalanaceae
03 medical and health sciences
Species Specificity
Polyphyly
Botany
Genetics
Phylogeny
ComputingMilieux_MISCELLANEOUS
Ecology, Evolution, Behavior and Systematics
Base Sequence
biology
Phylogenetic tree
Genetic Variation
Sequence Analysis, DNA
15. Life on land
biology.organism_classification
Phylogeography
030104 developmental biology
Evolutionary biology
Hirtella
Biological dispersal
Subjects
Details
- ISSN :
- 00029122
- Volume :
- 103
- Database :
- OpenAIRE
- Journal :
- American Journal of Botany
- Accession number :
- edsair.doi.dedup.....8fca76176d943807fd72274794f976e7